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Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists01:28

Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists

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Neurokinin 1 (NK1) receptors are distributed across the GI tract, vagal afferents, and key CNS regions including the central vomiting center and chemoreceptor trigger zone (CTZ) Chemotherapy agents stimulate enterochromaffin cells in the gastrointestinal (GI) tract to release large amounts of substance P (SP). SP is a neuropeptide released by specific sensory nerves in response to many different stressors, including those in the GI mucosa affected by chemotherapy.  SP binds and activates...
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The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins”   is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This...
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The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
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Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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5-HT3 receptor antagonists, such as dolasetron, granisetron (Kytril), ondansetron (Zofran), and palonosetron (Axoli), are crucial in managing chemotherapy-induced nausea and vomiting (CINV) and postoperative nausea. These drugs selectively block 5-HT3 receptors in the visceral vagal and spinal afferent nerves, chemoreceptor trigger zone, and the vomiting center. They have a rapid onset of action and can be given as a single dose before chemotherapy. Ondansetron and granisetron, in particular,...
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Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors
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关于hCNT3结构/功能和核酸抗癌药物的研究进展.

Xinru Yue1, Xun Zhang1, Derong Zhang2

  • 1Sichuan Provincial Education Department Key Laboratory of Medicinal and Edible Plant Resources Development, College of Pharmacy, Chengdu University, Chengdu, China.

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概括
此摘要是机器生成的。

人类度核酸转运体3 (hCNT3) 将核酸抗癌药物输送到目标部位. 了解 hCNT3 的理解

关键词:
在Na+-合.TM9.9 是一个很棒的游戏.hCNT3 在线观看分子设计分子设计.核酸的输送 核酸的输送基质识别 基质识别

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科学领域:

  • 膜蛋白结构和功能 膜蛋白结构和功能
  • 药理学和药物输送
  • 分子进化和保护分子的发展和保护.

背景情况:

  • 人类度核酸载体3 (hCNT3) 促进核酸和核酸类型的抗癌药物吸收.
  • hCNT3在向疾病部位输送治疗剂方面发挥着至关重要的作用.
  • 它的结构和功能特征对于药物开发至关重要.

研究的目的:

  • 审查hCNT3.3的序列演变,保存和分子结构.
  • 要总结hCNT3的基质识别,运输机制和与核酸衍生物药物的相互作用.
  • 为设计针对hCNT3的新型抗癌药物提供理论指导.

主要方法:

  • 审查关于hCNT3.3的现有文献.
  • 对序列演变和保存数据的分析.
  • 检查hCNT3和同类载体的结构和功能研究.

主要成果:

  • hCNT3在脊椎动物中表现出高度的保护性,并具有明显的支架和运输领域.
  • 传送器使用类似电梯的运动,涉及跨膜螺旋和发针环用于基质转移.
  • hCNT3识别和运输各种核酸衍生抗癌药物,包括fludarabine,cladribine,decitabine和clofarabine.

结论:

  • hCNT3的结构和功能性质是其在核类模拟药物输送中的关键作用.
  • 了解hCNT3的传输机制和基质特异性可以为设计更有效的抗癌疗法提供信息.
  • 对hCNT3的进一步研究对于开发有针对性的药物输送策略至关重要.